plumiConfidence intervals: Edexcel A‑Level Further Maths questions
Edexcel A-Level Further Maths past-paper questions on 7.2 Confidence intervals, 2018–2025, with mark schemes and examiner’s reports where available. Add MadAsMaths questions to your practice, or browse them separately by topic and difficulty.
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All 12 questions on Confidence intervals, as a list
- June 2025, Further Statistics 2, Q4 (13 marks): The weights of apples Sam grows are normally distributed with a mean of 131 g and a standard deviation of 6 g A supermarket will only buy apples with weights in
- June 2025, Further Statistics 2, Q7 (11 marks): A random sample X1 , X2 , X3 , X4 and X5 is taken from a distribution X ~ N (μ, σ 2) Nina and Jonah each use unbiased estimators to estimate μ Nina uses X‾ = 1
- June 2024, Further Statistics 2, Q3 (8 marks): A factory produces bolts. The lengths of the bolts are normally distributed with mean μ mm and standard deviation 0.868 mm A random sample of 15 of these bolts
- June 2023, Further Statistics 2, Q2 (12 marks): Camilo grows two types of apple, green apples and red apples. The standard deviation of the weights of green apples is known to be 3.5 grams. A random sample of
- June 2023, Further Statistics 2, Q3 (8 marks): Two machines, A and B, are used to fill bottles of water. The amount of water dispensed by each machine is normally distributed. Samples are taken from each mac
- June 2022, Further Statistics 2, Q2 (12 marks): A factory produces yellow tennis balls and white tennis balls. Independent samples, one of yellow tennis balls and one of white tennis balls, are taken. The tab
- June 2022, Further Statistics 2, Q5 (8 marks): The concentration of an air pollutant is measured in micrograms/m3 Samples of air were taken at two different sites and the concentration of this particular air
- November 2021, Further Statistics 2, Q6 (15 marks): Elsa is collecting information on the wingspan of two different species of butterfly, Ringlet and Meadow Brown. She takes a random sample of each type of butter
- November 2020, Further Statistics 2, Q2 (6 marks): 2 Jemima makes jam to sell in a local shop. The jam is sold in jars and the weight of jam in a jar is normally distributed. Jemima takes a random sample of 8 of
- November 2020, Further Statistics 2, Q6 (12 marks): 6 A new employee, Kim, joins an existing employee, Jiang, to work in the quality control department of a company producing steel rods. Each day a random sample
- June 2019, Further Statistics 2, Q1 (8 marks): 1 A machine is set to fill pots with yoghurt such that the mean weight of yoghurt in a pot is 505 grams. To check that the machine is working properly, a random
- June 2019, Further Statistics 2, Q6 (9 marks): 6 A company manufactures bolts. The diameter of the bolts follows a normal distribution with a mean diameter of 5 mm. Stan believes that the mean diameter of th
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